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AAKASH SERIES-TRIGONOMERTIC RATIOS-EXERCISE- II
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- sin^(4) theta + 2 sin^(2) theta (1-(1)/("cosec"^(2) theta ) )+ cos^(4)...
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- cos^(2) 5^(@) + cos^(2) 10^(@) +cos^(2) 15^(@)+...+cos^(2)360^(@)=
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